diff --git a/README.md b/README.md
index b0cf382..8b87944 100644
--- a/README.md
+++ b/README.md
@@ -39,3 +39,6 @@ Then, visit http://localhost:5000
 > We're trying to remove the need for the `export` statements, but…
 
 
+## Build CSS and JS for prod
+
+    flask assets build
diff --git a/requirements.txt b/requirements.txt
index 664682c..4a16182 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,14 @@ enum34==1.1.6
 geopy==1.20.0
 python-dotenv==0.10.3
 
+# Spreadsheet reading
+# Note that 0.24 is the most recent version still supporting python 2.7
+pandas==0.24.2
+# Excel support for wisdom-impaired Microsoft users
+xlrd==1.2.0
+# ODS reading support is only available natively in 0.25
+# pandas_ods_reader
+
 # Testing
 pytest==3.0.5
 pytest-cov==2.4.0
--
libgit2 0.21.2